Nepean Bay Weather Forecast

    • 15
    • 22

    Mostly sunny

    • 12
    • 19

    Cloudy

    • 13
    • 20

    Cloudy

    • 12
    • 26

    Mostly sunny

    • 13
    • 23

    Partly cloudy

    • 13
    • 23

    Partly cloudy

    • 12
    • 24

    Partly cloudy

Today 11 Mar Kangaroo Island

Partly cloudy. Winds southwesterly 25 to 35 km/h turning southerly 20 to 30 km/h in the early afternoon. Daytime maximum temperatures in the low 20s.

Investigator Strait Coastal Waters

Wind
Southwesterly 15 to 20 knots, reaching up to 25 knots through the Backstairs Passage in the late morning. Winds turning southerly in the early afternoon.
Seas
1 to 2 metres, decreasing below 1.5 metres during the afternoon.
1st Swell
West to southwesterly below 1 metre.
Weather
Mostly sunny.
Weather Situation
A high pressure system centred in the Tasman Sea extends a ridge over SA. The ridge moves eastwards ahead of a cold front and trough moving across the west and south of SA today. The trough will clear the northeast during Thursday whilst a high pressure ridge moves across waters well to the south. A low pressure trough is expected to develop over the far west of SA on Friday then move slowly eastwards over the weekend.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Nepean Bay Temperature Statistics View More

March Temperature

Kingscote Airport (7km)

  • Lowest 9 March, 2026

    7.6 °C

  • Average March

    17.3 °C

  • Highest 5 March, 2026

    27.1 °C

Climate (2021–Present)

Kingscote Airport (7km)

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  • Average Low 2021–2026

    9.2 °C

  • Average 2021–2026

    14.8 °C

  • Average High 2021–2026

    21.1 °C
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